Machine for forming barrels.



L'. BAUROTH.,

Mmmm FOR 'mamma BARRBLS.

APPLIATIOH FILED DEC. 27, 1911.

Patented mal..

llllll lllll lllly y @Wwf-f L. BAUROTH.

'MACHINE FOR FORMING BARRELS.

' APPLIGATION FILED DEO. Z7, 1911.

. Patented. Get. l, 19H2.

2 SHEETS'SHEBT 2.

en 'ferri r 'www el' glia .All .iii if@ VI'LBLE COPY earnirr oirnron.

Seecication of Letters Patent.

Replication filed December 2?, 3.911. Serial No. 668,040.

' oi hio. have' invented certain new and useiul lmproremente in Machines Jor Forming llirrele, ofi which the followiui a speci- My invention relates to nmoliines for rior-.ling the bodies of` metallic barrels of (-1, foi-u1 from cylindrical blanksv of proper diameter and length, according to the eine of the barrel desired, and of suitable material such as sheet steel,

Speaking' in general terms my machine comprises a pair of plungers movable tof ward and aivay from each other and carrying at their outer ends a pair of expansible heads composed of die members which are outwardly andV radially expansible by preseureofrontact with. each other, the die he ini; expanded outwardly against the inner eurlaee oi. the h el iilanli 'wliieli is thereby shaped te the .traine forni. as the outer sorwander/l. By pweibl-ence4J and as herein Shown, the efqiansihle heads are so conetruoted that they initially Contact and grip the barrel blankinidway of its length after' which the pressure is applied progressively or'ivardly toward opposite ends.

ldy machine embodies other novel and ad veutegeoue ifeatureeo construction ineluding barrel holders, which will he made apparent from the description hereinafter given.

in the drawings Figure Si 1s a plan View nent .of my invention; Fig 2 vnew of the piangere and ern eads in their relative positions at 'gilet-ien of the formation of the bar rel body; Fig. 3 a View similar to Fig. Z'hut iii Sitio-n of the piangere and. hea iai. contacting of the oai-relrieir olf the leitliand end. thereof; "Q au enlarged seotionaldetail view line 7M? of ireeent embodiment of 'faire oi the die members when thus elfe' S hut on a larger my invention. ae herein illustrated, the .main portion oi the machine comprises end :trames l', l, connected by tie rods 2, 2, anda bed dplate 3. This hed plate is provided with guides 3a in which slide plungers Ll which are movable toward and away from each other in suitable manner as by the particw. liar means hereinafter described. These sides by:

guides are closed at their outer means oi the longitudinal plates 3b, thereby oonlining the'plungers within the guides. Ql`he intermediate port-ion of the bed plate at one side thereof as at 3c is 'out away so as to provide a space for the operation of the expansible heads .new lto be described. Each plunger carries at its outer end an expansible head comprising essentially a core or supporting member and a series'of outer and intermediate' die kmembers. shown the supporting member 5 of each ria-rented oct. 1,1912'.

head is secured rigidly to the outer end of its plunger and thev same has connected to it by pivotal means such as the 'links 6, a'

series' of intermediate diel members 7.' These links are arranged to act in parallel. rela tioneliip and are conneeted at their outer ends with the .supporting:member and intermediate die members respectively' each.

'of said die members ,being individually conneoted with the eupporting member hy its own pair of linke'.`

of these die members is slotted or recessed- .The inner side of each l so as toperrnt of thep'roper and sufficient e lrelatiime ln1ovementsl of the die members .and j" her. The outer series of die members' 8 are the same jin number as the inner or intermediate series and. surround the same. They are mounted to slide upon` the inter mediate nieinhe 9, lthe tongues and grooves extending trans 's and have.. 'a tongue and. groove connection therewith indicated at--r links 'with' respecttozithe supporting memf rereely off the faces: ol said members. The i construction andarrangement of the parte is -euoiithat wheinin the inward `niovement oi? the piangere the outer'adjacent ia'ces of f.

the two heads Contact and are thereby ar rested, the-pressure causes a radial expansion of the die members against the cylindrical barrel blank indicated at A, the' plungers and the oentral'support 5 contin ning` to more inwardly toward each other after the die :members have hegunto o`o`- Y operate with the barrel blank. In the de` scribed expanding operation the,interme diate members are expanded radially and act as wedges upon the outer die members, as will be clearly apparent from an 4inspection `of Fig. ,/i. rlhe die members are of such shape' that 'when they are fully. eX- panded they conform to the desired shape ont' the bilge of the barrel. Moreover, these die members are so formed that they in-v crease in cross section `from their inner'to their outer ends in order that when expanded their outer ends shall c ontact the blank first, as just explained..

Upon the outer ends of the plungers are mounted the work holders, each comprising a hollow cylinder or shell 10 having an' inturned annula-r-liange 10EL at its inner end adapted to coperate with a tlange 3d on Aits plunger. The .outer end of each holder is .flanged and outwardly iiared to form a socket 10b to' receive an end of the barrel blank. When the expansible heads are retracted they are located within-these hollow work'hclders as illustrated in Fig. 1, but upon thei movement of the plungers toward each other the heads are `forced out of the holders as illustrated in Figs. 2 and'B.v The two holders are held projected toward each" other and against the ends of thebarrel blank with a yielding pressure as by means vof the coiled springs 11 located in spring chambers inthe bed plate 3 and cover plate 3b. Nlien the plungers are retracted to their fullest eX- tent they slightly withdraw or retract the holders by reason of the engagement of the shoulders 3d and 10a, it being understood that after the barrel blank has been inserted and the plungers have started to approach each other the work holders will advance slightly and be held in engagement, with the ends of the blank by reason ot the pressure of said springs. The holders 10 apply pressure to the ends of the barrel blank and keep pressing against such ends in the contracting movement of the latter incident to the formation of the bilged barrel body from such blank.

As stated, any suitable mechanism, may be employed for properly reciprocating the plungers, and the particular driving lmechanism herein shown represents one means which may be used.- As shown the plungers are acted upon by a air. of'liirum cams 12 each having a cam rib 12gy adapted to cooperate with rollers 13 dhd14 journaled within the plungers toward one end. By a single rotation of the campdrums the plurr gers are given a complete 'reciprocation These cam drums are secured to a shaft 15 journaled in the end frames 1 of the machine and driven through the medium of thegear 16 thereon, pinions 17 on a drive shaft y t. i laadriresaer pfloesely/mvunted @the driven shiktt and \adagp.tedto be placed into Leccese,

engagement therewitln` by means of the clutch 2O secured to the\drive shaft and op erated by the clutch shifter 21. The gear 19 is operated in any suitable manner and by operating the shifter 21 the drive shaft 18 is caused to be rotated and likewiselthe cam drums and plungers are actuated.

By the means above described I am en- `abled to form bilged barrel bodies from sheet metal with great rapidity and economy and to obtain uniformity and perfection in the product. llloreover, in the particular mechanism' described, the barrel bodies are formed without the employment of an outer or hollow die.

I claim:

1. In a machine for forming barrels from cylindrical blanks, an expansible die and means cooperating therewith to initially engage the die with the middle portion of the blank and'ex'pand the same, thereafter progressively applying expanding pressure toward the opposite ends.

2. In a machine for forming barrels from cylindrical blanks, an expansible die structurey adapted to be placed within a blank an'd comprising a series of die members which are of greater width at that portion presented to the blank midway of its length, and means for causing said members to expand, whereby the die initially applies pres sure to the blank midway ot its length and progressively outwardly toward the end thereof. A

3. In a machine for forming barrels from cylindrical blanks, an cxpansible die structure adapted to be placed within a blank and comprising a series of die members which are of decreasing cross sections from that portion presented to the blank midway ot its length., and means for causing said members to expand, whereby the die ini tially applies pressure te the blank midway of its length and progressively outwardly toward'the ends thereof to form the body of a bilged barrel.

4t. In 'a machine for forming barrels fromAJ cylindrical blanks, an expansible die strueture adapted to be placed within a blank and comprising a series of inner and outer die members which, when eipanded, correspond with the interior of the body of a bilged barrel, said die members being of a form to contact with the interior vof the blank midway of its length upon tlie initial expansion and to apply pressure to such blank progressively toward the ends thereof, and means for expanding the die members.

5. In a machine for forming barrels from cylindrical blanks, an expansible die structure adapted to be placed within a blank and comprising a series of inner and outer die members which, when expanded, correspond with the literior of the body oi' a bilgedbarrel, sad diemembers being of progressively outwardlyT toward the end thereof.

6. In a machine for forming barrels from "cylindrical blanks,` an expanjsible die Vvstructure adapted tobe placed within a blank' and Icomprising a `series of die members adapted to initially contact-the blank midway of its length., a central support for said members, and means for moving said sup-` portto cause expansion and contraction 'of the members. f

7. In a' machine for forming barrels from cylindrical blanks.; .expansible ldie structureadapted ,tubeY placed.,` within a blank and comprising` a' series of die members adapted to initially contact the blank midway ofits length, a central support for said members, pivote-d links" between said; sup! port andinen'ibers, and means for moving said support to cause expansion and conn traction of the members.

8. In a machine for forming bilgcd barrels from cylindrical blanks, an expansible die structure adapted to be placed Within a blank and including an outwardly movable portion constructed and arranged, in act of expanding, to initially grip and hold and to apply pressure to the blankinidway of its length and to apply pressure progressively toward opposite ends thereof, and ineansfor applying pressure to an end of the blank.

9. In a machine for forming bilged bar- 'reis from cylindrical blanks, an expansible die structure adapted to be placed within a blank and including an outwardly movable portion constructed and arranged, in act of expanding, to initially grip and hold and to apply pressure .to the blank 'midway of its length and to apply pressure progressively toward opposite ends thereof, and means for applying pressure to both ends of the blank.

10. In a machine for forming bilged barrels from cylindrical blanks, an expansible die structure adapted tobe placed within a blank and including an outwardly movable poition constructed and arranged, in act of expanding,lto initiallygrip and hold and to apply pressure to the blank midway of its length and to apply pressure progressively toward opposite ends thereof, and holders for engaging the, ends of the blank and following them up in their contracting movement resultant upon the formation of the bilge.

11.y In a machine for forming bilged ba rels from cylindrical blanks, an expansible die structure adapted to he placed within a blank and constructed and arranged, in act of expanding, to initially grip and hold and to Iapply pressure to the blank midway of its length and to apply pressure progressively toward opposite ends thereof, and spring-pressed holders for engaging the ends of the blank with a yielding pressure and arranged to follow them up intheir contract ing movement fresultant upon the formation of the bilge.

12. In a barrel forming machine, a pair of plungers movable toward and away from l each other,` and diametrically expansible heads carried by the plungers. I

13. In a barrel forming machine, a pair of plungers movable toward and away from each other, and diametrically expansible heads carried by the plungers and arranged to be expanded by' pressure of each against the other.

14. Ina barrel forming ma-chine, a pair of plnngers movable toward and away from -each other, 4and expanding heads mounted upon the inner ends of -the plungers, each head having. expanding die members which are outwardly movable by contact of the heads with each other. 4

15. In a 'barrel forming machine, a pair of plungers movable toward and away from each other, and expansible heads carried by the plungers, each head comprising a central support connected with its plunger and a series of die members pivotally connected with such support.

16. In a barrel forming machine, a pair of plungers movable toward and vaway from each other, and expanding heads mounted upon the inner ends of the plungers, each head having a series ot pivoted die members which are outwardly movable by Contact of the heads with each other.

17. In a barrel forming machine, a pair of heads movable toward and away from each other and having expanding die members which are of greater width at their outer ends inorder to initially Contact the barrel blank midway of its length.

18. In a barrel forming machine, a pair each other andhaving expanding die memilo bers which are of greater width at their outer ends and are inclined fromsuch ends inwardly toward their central longitudinal axis in order tol initially contact the barrel blank midway of its length.

19. In a barrel forming machine, a pair of heads movable toward and away from each other, each head comprising a central support .and a series of die members connected `therewith and of increasing cross section' from their inner to their outer ends in order that when expanded their outer ends' Shall contact the blank first.

20.. In a barrel forming machine, an expanding head .consisting of a,central support, a series of d ieimembersl each connectedn thereto by a pair fo-.pivoted links and extendingbeyondthecentral support when in collapsed position and adapted to be swung outward by pressure upon their projecting ends. l

21. In a barrel forming machine, an expanding head consisting of a central support, a series of intermediate die members away from the same, and an outer series of die members surrounding and mounted upon the intermediate members and movable relatively thereto both radially and longitudinally thereof, the outer faces of both the outer and intermediate' members being shaped to conform to the desired form of barrel.

23. In a barrel forming machine, the combination of a pair of plungers movable toward and away from each other, diametrica'lly expansible 'heads carried by the plungers, and holders for engaging the ends of the barrel blank.

24. In a barrel forming machine, the combination of a pair 'of plungers movable toward and away from each other, diametrically expansilole heads carried by the plungers, and holders for engaging the ends of the barrel blank, said holders being hollow and arranged to surround the heads when retracted. y

,25. In a barrel forming machine, the combination of a pair of plunge-rs movable toward and away from each other, diametrii cally expansible heads carried by the plungers, and holders for engaging the ends of the barrel blank and'mounted upon the plungers respectively.

26. 4In a barrel forming machine, the combination of a pair of plungers movable jtoward and away from each other, diametrically eXpansible heads carried by the plungers, holders for engaging the ends of the barrel blank, anti means for pressing the holders toward each other with a yielding pressure.

27. In a barrellforming machine, the combination of a pair of plungers movable toward and away from each other, diametrically expansible heads carried 'by the plungers, and holders for engaging the ends of the barrel blank, and springs acting upon the holders forpressing them toward each other with a yielding pressure.

28. In a barrel forming machine, the combination of a pair of plungers movable toward and away from each other, diametrically expansible heads carried by the plungers, and holders for engaging the ends of the barrel blank, said holders being mounted upon the plungers respectively and being arranged to be slightly retracted thereby i when the latter are retracted.

l29. In a barrel forming machine, the coinbination of a pair of plungers, movable toward and away from each other, diametrically expansible heads carrie'd by the plungers, and holders mounted upon the plungers respectively and having circular sockets to engage lthe ends of the barrel blank.

30. In a barrel forming machine, the combination of a pair of plungers movable toward and away from each other, diametrically expansible heads carried by the plungers, and hollow holders surrounding the heads when retracted and mounted upon the plungers, said holders and plungershaving coperating ianges whereby the holders are slightly retracted with the plungers and heads. i

3l. In a barrel forming machine, the combinaticn of a pair of plungers movable toward and away from each other, diametrically expansible heads carried by the plungers, holders for engaging the ends of the barrel blank, a bed plate having guides for said plungers and also having spring chambers, and springs therein acting upon the 

